Excavating machine of the rotary type



L. LARSEN.

EXCAVATING MACHINE OF THE ROTARY TYPE,

APPLICATION FILED JUNE 1, 1920-,

PatentedSeptQ 12,1922.

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FIG. I

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L. LARSEN.

EXCAVAT'ING MACHINE OF THE ROTARY TYPE.

v APPLICATION FILED JUNE 1, 1920. 1,428,788.

Patented Sept. 12,1922.

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L.LAIRSEN.

APPLICATION FILED JUNE 1, 1920.

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Patented Sept. 12, 1922.

LEE massif, 0F TAM?ICO, Mexico} "'F Erica-Vanni MAeiiiNE'onTH'Enor'rAR-Y 'rrriii .i Application 'fiia June 1, 1920. Serial No. 385,848.

To all whom it may concern Be it known that I,'LEE LARsEN, a citizen ofthe United States of America, residing at Tampico, int-he State ofTamaulipas, Republic of Mexico, have invented certain new and. usefullr'n'provernents in Excavating Machines of the Rotary Type, of which thefollowing is a specification.

My invention relates to' excavating machines of the rotary type usedin'construction of reinforcedfconcrete' columns or piers, which shall;serveassupp'orts for bridges, wharves,*bulk-hea'ds, light-houses, etc.in order-to secure foundationsfor the same.

The objects of my invention are toproduce a combined apparatus whichincludes means. for"excavation and removingthe excavated material whiletheapparatus penetrates the strata gradually, and at the 'saine time to.provide a casing or coffer dam of any desired length Ondiameter; builtup gradually in sections, inside which casing the concrete 'work'canbe'placed in a convenient" manner without difiiculties, and which casingafter the'work has been performed can be removedto'be used at otherwork."

My inventionincludes means wherebyit is possible to twist down cylindersby-"water pressure and jetting or dredging;and at the same time toremovethe excavated material by suction; means are also provided foraquick and easy disman'tling and removing of the apparatus.

Especially where difficult conditions for I foundations are met with, itis possible by this combined excavating and suction machine to work downthrough any strata of the soil, and by its simpleficonstruction thewhole apparatus is easy zto-handleand will 'in-practice saveconsiderable time'and ex combind appairatus and piping system emlo d forexcavating the grou Figmze 2 i a t p -v1ew "and Figure-3 asectional'plan view of the apvidedwith a strainer lt'to allow only a'paratus,'on' line 33 of Fig.1.

and ti Figure 5 is-a plan view of'the same, being a trarisversesectidnon line 5 51ofF1g. 4;.

ings, these figures show the instrumentsenr.

ployed to dredge the way down for the columns or pie-rs etc. to beconstructed. 1 is a cylinder or tube of strong construction,conveniently made up of one top and one bottom piece or section, 1 and 1to which sections of steel tubes or cylinders of a suitable lengthgradually are connected, and on the inner side of same bolted up andjoined together by angle iron rings, 1 and1 or other means convenientfor the purpose. To'the edge of the top piece 1 of the cylinderl is:riveted 'an anglel iron ring 3 which when connectedup rests onballs 5and turns freely in a channel ring'lformed by angle ironsconnected tothe lower part of hangerarms 2. Bymea'ns of a frame made of two angleiron rings,,7 and 7 fastened. to the upper part of armsQ is connectedthe top piece emf the combined ball bearing'swivel boX intended for thepiping system. To this swivel which is shown in details in Figs. 4 and 5and forms an essential part of my invention,is connected the hose 10 forwater, which is pressed down and forced through the box into jet pipes11. These pipes are madeupof short pieces according to the lengthrequired, and connected up ,to the bottom casting or body 6 10fsaidfswivel,

serving at the same time as pivot or shatting;

on whichthe bottom body 6 of the swivel box with jet pipes 11 can freelyturn on balls 13. The suction pipe 12 is held up by clamps 33 whichareset in a slot 34: in ring 24 and can be tightened together by bolts 35(see 'Fig 4) thuspresting in said ring to prevent the suction pipe 12from turning round. The bottom end of this pipeis proconvenient'size ofmaterial to enter the suc tion. pipefin order not to stop the passage ofthe material to be dredged out. On the lower part of the suction pipe 12is screwed a 'T-sha'ped ring 15 which. forms a bearing material to beexcavated. Theseknives'or for a rotatable ring made up of two 2 shapedirons or castings 17', which carry the knives or cutters 19 forloosening the cutters are fastened to a frame 18 made up of angle irons18- and 18 and provided with I hinged double hooks 16 which can beconnected to the cylinder 1 in the flanges or angle irons 1 as shown inFig. 3 so that they easily can be pulled out with the whole machinery byloosening the hooks withthe wire cables or manila ropes 20 when thecylinderor casing 1 is down to its place, to leave the cylinder entirelyclear to receive the concrete construction. In order to run easily andwith a convenient speed bearing 15 is supplied with balls 21 for thispurpose, andit is well understood that the suction pipe 12 and also thecutting machine 19 can be lowered down and easily adjustedaccorct ing tothe progress of the, excavation work by adding more sections to suctionpipe 12 in the same way as the cylinder sections.v "The bottom section 1of cylinder l which preferably is made of tempered steel, is at the edgeprovided with teeth, 8 like a cross cut saw, which will help to ,cut andloosen hard material encountered. a The hangers 2 can be placed in anysuitablehead-frame'or framework by means of steel cables 22 or theli'ke, which .can be adjusted by tightening or loosening'the turnbuckles 23 in order to always keep the cylinder in proper balance so notto runbut of plumb and not to leave the'cylinder orcutting machineryresting too :hard on the ground to prevent hard strain on the rotary.

With reference tofFigs. 4t and 5 which i show the combined ball bearingswivel box,

this box consists oftwo p arv ts,"6 and 6 o f which body 6 is connectedvto thean le iron frame 7 (Fig. 1) which is fixed to hangers v e 2. Body6 rests'on flange 36 of the vupper body of the box by means of a ring 24which is screwed to the upper edge of the inside dlvision 32 ofbody 6entering the recess 27' thus forming a canalor passage-28; through:

which the water'fronifthewaterhose 1Q cup for the balls 13,,and isagainst'the flange 38 [of the upper body 36 passes to be. conducted tothe jet pipes 11 to help loosen the material to, be removed b suctionthrough is provided with so that {the lower boxjcan. tur-n'easily ontheballs 13; placed between I their surfaces, the flangeor gland 39ventering the recess 27-so (I 2 4 that it formsa tight wholem upsothatcylinder l and thelower 'body 6 j (at pipes 11 as well {as thecastings 1?' .with' the knives or cutt'ersf 19 can turn freely,

w -hi'lethe hanging mechanism 2 with ,theupp.9 gbq 6 of the, sw vel towh h. sectionpipe 12. Thebox body 6; a flange 37 which serves as pressedlightly up' pipe 1 2 is fixed by ,meansoii clamps 33, the

cylinder lfof convenient length is gp'laced in the rotary table (notshown) and the hangers adjusted to its proper height, and then the wateris turned on through water hose 10 pressing the water through the swivelbox into the jet pipes 11. The cutting machine 19, will nowwork its waydown loosening the material to be excavated and at the same time giveway fonthezcylinderl turnedby the rotary, the. saw. likeeedge 8 onthe:bottom section will also help in looseningany class ofobstructingmaterial tobe excavated,

by being supplied' With suflicient water from the jetting system. The.materialthus loos- 8O ened will at the same time be. removed-by suctionthrough the suction pipe 12..*Grad' ually, according to the progressofthe work, sectionsofjtubes are added'to the cylinder 1 and piecesconnected.byiunions ll to the jetpipes 11, which easily can beaccomplished by taking the apparatus apart while putting in newsections. "When, the. cylinder has reached the depth from which thecolumns or piers shallbe constructed the meeh anism' with the-cuttingmachine=19 :is discona nected and removed by lifting the hooks 16 out oftheir seat by'm'eans of the cables" or ropes 20,- and the constructionofthe columns'or piers-can now bzes'proceeded with; After placing therespective inoldsxor forms for the columns or =piiers, the cylinder orcas' ing 1 (which cuttingedge 8-convenientllyis kept in a level!'abovethe'concreterof the foundation forthecolumnsor piers) can be l removedto be used on other jobs, thus'saving the expense ofnew cylinders foreach C01umn; v i t It is unnecessaryto mention all the great; advantagesthe employment of this "appara-3 tus .by its-simpleconstruction willoffer to Y any operating work where this combination can be used, and bysmall changesin the de tails of the=constructiona:of-Zthe apparatus,which I reserve ascovered in'the s'cope 'o'f my invention, itcan'be-fittedto-servealmost v I the desired height zofxth'e columnt'ovbe con- "After they apparatus has beencOnnected,

structetl, 'to form ,accasin'g inside; which said column canbebuilt'iip;'- a combined swivel '125 box support, said support: havingpassagewayforuiwater supply; "a water supply I piping system forloosening the material to b'e excavatedga suction pipe line forconveying the excavated me eial;-said water"and' sue 13o tion systemsbeing combined with said swivel box support; a suction pipe providedwith means to separate the excavated material, said suction pipe at thesame time serves as bearing and pivot on which said cylinder can turn; arotatable cutting apparatus connected up to said cylinder and suctionpipe with freedom of turning around together with said cylinder on saidsuction pipe.

2. An excavating machine of the type described, as set forth in claim 1,in which the water supply for loosening the material to be excavated isintroduced into the jetting pipe system through a passageway formed in acombined swivel box, said swivel box being formed by two bodies of whichthe upper body forms a part of the support for said excavating machineand fixed to hangers for said apparatus, the other lower body carryingsaid jetting pipe system can turn freely around the suction pipe whichserves at the same time as pivot for the excavating apparatus.

3. In an excavating machine of the type described, as set forth in claim1, a suction pipe through which the excavated material can be conveyed,said suction pipe at the same time serves as pivot for the combinedapparatus; a cutting machine; and means for carrying and adjusting ofsaid excavating apparatus.

In testimony whereof I affix my signature in presence of two witnesses.

LEE LARSEN.

Witnesses:

F. MATHEsON, MIGUEL SnLKowITZ, C.

